Use and understanding of dimensional language facilitated conservation. (ST)

This study examined the resistance to conservation of quantity extinction in 180 subjects across the life span. The results indicated that both resistance judgments and explanations were found to develop in a curvilinear fashion, increasing with age until young adulthood and declining thereafter. (JMB)

Two studies were conducted to examine whether the elderly maintain the competence to solve Piagetian conservation problems. The results are discussed in terms of a distinction between competence and performance. (JMB)

This study used a rating scale, a betting game, and a feedback phase to examine the certainty with which 60 second graders and 36 fifth graders made judgments on tasks involving various forms of conservation and transitivity. (Author/JMB)

This study examined the relation between symbolic play training and conservation in 30 middle-class nonconserving 4-year-old children. Results showed that 13 experimental subjects manifested some change in solving conservation problems after symbolic play training while only one control subject showed any change toward conservation on the…

University students' understanding of the laws of matter conservation, weight conservation, gravity and the functioning of levers were examined before, during, and after a traditional weight conservation task in which a surreptitious deception caused the pan balance scale not to balance. (Author/JMB)

Purpose of study was to investigate the applicability of Piaget's theory and methods to the study of conservation in nonhumans. Two out of four subject monkeys achieved stringent and statistically significant performance criteria in sameness-difference judgment tests and showed significant generalization in the fewest possible trials. (Author/SB)

Eight quantitative comparison tasks were administered to four- to seven-year-olds. Findings indicated that performance on comparison tasks was related to performance on a number conservation test and to age. Factor analysis yielded a unitary factor. (RH)

This study demonstrates that, given the assumption that the child does have some understanding of both height and amount, many nonconservers do give correct reversal judgments for both. Also, reversibility data from this study do not support the theory that a new stage appears when water conservation judgments appear. (Author/ED)

This article discusses the results of an earlier experiment which demonstrated a relationship between children's prior understanding of the compensation rule and their tendency to benefit from conservation training. These earlier results are then compared to the results of this experiment which employed different procedures and found no such…

This study assessed the recognition by conserving and nonconserving first graders, of true and false permise and inference sentences following story presentations. Conservers performed slightly better than nonconservers on sentences other than true inference sentences, thus indicating that concrete mental operations are related to the process of…

The effects of modeling and corrective feedback on the conservation of equalities and inequalities were studied. Both training methods were successful in teaching children to conserve. Trained children were also capable of generalizing their learning to new conservation tasks. (CS)

Children at three age levels (4-6, 7-9, and 10-14 years) performed a reaction-time version of Piaget and Inhelder's rotating squares imagery task and a pivot and shape conservation recognition task. (JMB)

Two experiments were conducted to study developmental changes in the integration of stimulus dimensions in an area judgment task. Following functional measurement methodology, absolute judgments on a linear graphic rating scale were obtained. (Author/SS)

The results of four studies involving three to seven year olds revealed that, by age three, some children (1) appreciated conservation of matter despite visual disappearance and the existence of invisible particles; and (2) made use of the particle concept to explain how a particle can continue to exist and maintain its properties despite visual…